/*
 * Copyright (c) 2013   Tobias Welther
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package de.tudarmstadt.kom.androidsensorapi.sensor.listener;

import android.hardware.Sensor;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;

import de.tudarmstadt.kom.androidsensorapi.sensor.SensorInterface;
import de.tudarmstadt.kom.androidsensorapi.sensor.data.AbstractSensorData;
import de.tudarmstadt.kom.androidsensorapi.sensormanagement.SensorTypeToData;

/**
 * Created by Tobias Welther
 */
public abstract class AbstractSensor<T extends AbstractSensorData> implements SensorInterface, SensorEventListener {

    /**
     * Says if this SensorInterface Is Registered at the moment.
     */
    protected boolean isRegistered = false;

    /**
     * The Sensor Type of this sensor
     */
    protected final SensorTypeToData sensorType;

    /**
     * The last data set that was updated.
     */
    protected T lastData;


    /**
     * Creates a Sensor with the passed sensor Type.
     *
     * @param sensorType to create
     */
    public AbstractSensor(SensorTypeToData sensorType) {
        this.sensorType = sensorType;
    }


    @Override
    public T getLastData() {
        return lastData;
    }


    @Override
    public void unregister(SensorManager manager) {
        if(!isRegistered) return; //no need to unregister unregistered SensorInterface.

        manager.unregisterListener(this);

        this.isRegistered = false;
    }


    @Override
    public void register(SensorManager manager){
        if(this.isRegistered) return; //no need to re register.

        Sensor defaultSensor = manager.getDefaultSensor(sensorType.getAndroidSensorType());
        manager.registerListener(this, defaultSensor, SensorManager.SENSOR_DELAY_NORMAL);
        this.isRegistered = true;
    }

    /**
     * Returns true if the Sensor is registered and working.
     */
    public boolean isRegistered() {
        return isRegistered;
    }
}
